The Asterisk War

The Asterisk War: The Academy City on the Water (Japanese: 学戦都市アスタリスク? Hepburn: Gakusen Toshi Asutarisuku, lit. "Academy Battle City Asterisk") is a Japanese light novel series written by Yuu Miyazaki, and illustrated by Okiura. Media Factory has published ten volumes since September 25, 2012, under their MF Bunko J imprint. The series was later serialized from January 2013 in Media Factory's seinen manga magazine Monthly Comic Alive where it was adapted into a manga. The artwork for the manga has been done by Ningen, three volumes have been collected into tankōbon. Eventually an anime television series adaptation by A-1 Pictures was made which began airing on October 3, 2015. The anime aired for two seasons at twelve episodes each from October 3, 2015, to June 18, 2016. Other media adaptations include a video game called The Asterisk War: Houka Kenran which was released in Japan on January 28, 2016.

It has been licensed by Aniplex of America in North America.

Plot
In the 20th century, an impact event called Invertia (落星雨 インヴェルティア? Inverutia) leads to the destruction of the Earth's numerous cities. In response to the declining economy, the Integrated Enterprise Foundation (統合企業財体? Tōgō Kigyō Zaitai, also "Integrated Empire Foundation") is organized to assume the world's leadership. The parallel city of Rikka (六花?), also known as Asterisk, has six academies which hold tournaments called "Festas" (星武祭 フェスタ? Fesuta) between humans with superpowers called Genestella (星脈世代ジェネステラ? Jenesutera). Seidoukan Academy (星導館学園? Seidōkan Gakuen) becomes the fifth highest-ranking academy in Asterisk. Ayato Amagiri, a Genestella, is determined to investigate the disappearance of his sister, Haruka. On his first day as a student, he encounters the Lieseltanian princess Julis-Alexia von Riessfeld. Ayato is forced to duel with her. The student council president, Claudia Enfield, voids the duel and transfers Ayato to the Seidoukan Academy.